Validate Textbox To Number Only

Dec 17, 2010

how to validate textbox to be number only by using custom validation, I mean what is the code?

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Validate Creditcard Number In Textbox?

Feb 10, 2009

I have created a Textbox for my credit card number entry for my payment webpage. how to make sure 16 digits of the number is entered . Methods such as count or something which i completely forgot?!

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Web Forms :: Validate A TextBox With A Number & With A Specific Text?

Nov 17, 2010

I've a Textbox

I can enter a Number which is greaterThan "0" or I can enter text which is only "NUMEROUS"


If I enter 0 (or) negetive Number (or) any text other than "NUMEROUS", i must display error msg Like

"Don't Enter 0/Negetive No./text other than "NUMEROUS"

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How To Validate The Maximum Allowed Number Of Characters In A Multiline TextBox

Mar 30, 2010

it's a multiline TextBox the MaxLength property does not work. At the moment I only see the option to use a CustomValidator with checking TextBox1.Text.Length on server side and perhaps in addition some Javascript client side validation.But isn't there a simpler way to do this, using the standard ASP.NET validators (RegularExpressionValidator, RangeValidator, CompareValidator, etc.)

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25 Digit Random Number Generator & Validate The Number When It Will Be Entered For Checking

Apr 27, 2009

how i can generate a 25 digit number for indentification (mail it to the user ) & how i shall check , when the user enter this number that it is valid or not ?

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Name Or Number Search In Textbox While Entering The First Letter Or Number Charactor Or Number?

Feb 2, 2010

I am using the and framework 2.0 with Ajax enable web.i have a text box and when user will enter "a" or number in this will search the name started from "a" character or number if he or she enter the number basically we can say live-search.

Employee search: Textbox.In this text box she/he will enter the first character of name or first number of employeeno and according to the a character name will search in list.

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Web Forms :: Validate Email ID And Also Validate Empty Textbox Using RegularExpressionValidator Control?

Nov 9, 2009

I have used below code for validating email id using RegularExpressionValidator....but the below code only validate email id...I want validatate empty textbox also..

ErrorMessage="Enter Valid Email ID" ControlToValidate="txtemailaddress"

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Web Forms :: How To Validate That One Listbox's Number Is Higher Than Or Equal To The Other Listbox's Number

Dec 19, 2010

I have been trying to figure out how to use <asp:requiredfieldvalidator> with ValidationExpression but am having a difficult time understanding the syntax of ValidationExpression. I'd like to make sure one textbox's number (1-12) is equal to or higher than the other textbox's (1-12) number. How is this accomplished and what's the syntax of ValidationExpression (hopefully I'm stating the question correctly).

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Regex - How To Validate ID Number

Sep 7, 2010

I am new at this so be easy on me... :)

I need to validate if a the ID number that the user typed in my site is a valid ID.

How do I check it?

Do I need to use RegularExpressionValidator?

More over, I also need to validate the credit card number, I found a few RegularExpressions for that in the net but each one is different from the other and I am not sure which one to use.. Does anyone know od a working expression that will suit all credit cards?

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Validate After Certain Number Of Postbacks

Oct 18, 2010

I have a peculiar situation at hand in which I need to validate a pair of dates in an ASP.Net web app.This is how my page looks like : I have a "From Date" field which consists a set of three dropdownlists ( for Year , Month and Date) I have a "To Date" field which also consists a set of three dropdownlists ( for Year , Month and Date). There is a "Download Report" button on the screen ( which allows a user to download a report for the specified date range) All these six dropdownlists are wrapped in a user control. Now all the 6 dropdownlists have a default "please select" value. When a user lands on the page for the first time , all dropdownlists are set to "please select". The "Download" button is enabled only after valid 'From' and 'To' dates are selected. Now my requirement is that :

When a user lands on the page for the first time , no attempt to validate the dates should be made until he selects all the 6 dropdownlists at least once. When the 6th dropdownlist is selected , the From and To dates should be validated. Once a user has selected all 6 dropdowns once , subsequently on every dropdownlist postback , the dates should be validated. My Issue: What's the best way to track these 6 distinct postbacks ( for each of the dropdowns) before starting to validate the From and To Dates.
I could maintain a flagin ViewState .. but is there a better way?

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C# - What Are The Condition To Validate A Phone Number

Dec 3, 2010

What are the condition to validate a phone number?

Well firstly it has to be a numerical value, can include the following numbers 0123456789 and the plus symbol. +

But what about the following conditions, where do you get this data?

-It has to be in the format [country dial code + area code + phone number]

-It has to be a min and max length

EDIT: also what is the min and max length of a mobile/cell phone number?

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JQuery :: Validate The Range Of Number?

Sep 13, 2010

How to Validate the Range of Number


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Web Forms :: How To Validate A License Number

Aug 17, 2010

I have requirment to prevent enteries of same number occuring multiple times. Like 99999,1111111, 6666, are invalid. How can I acomplish this? Is there any general license validator funtion some one has writte?

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Web Forms :: TextChanged Event In A Textbox To Validate A Value In Textbox?

May 13, 2010

I aam working with textChanged event in a textbox to validate a value in textbox.hen i am enter data in textbox then press submit button i am getting validation summary before the textbox textchanged event. Is there anyway to fire textchanged event first to validate before button validation summary?

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Datatable Field Validation - How To Validate Port Number

Jul 23, 2010

i have imported data from excel to datatable but i need to validate port no column which should

allow only numeric value and also i need to check the single quotes and need to replace to double quotes.

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Web Forms :: Validate Number For Regular Express Validation?

Mar 28, 2011

how can i validate a textbox with 5 number only are allow to fill in and first number must number 3. For example like 3XXXX,3YYYY (X and Y are number).

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C# - How To Give Code To Validate Textbox If The Textbox Not Contains The Value

May 7, 2010

give code to validate textbox if the textbox not contains the value except "mm-dd-yyyy" fromate it shoud display error message.

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Web Forms :: Validate Number Inputed Is Inbetween Ranges Sotred In A SQL Database?

May 26, 2010

I have a SQL database with a table storing three collums. ClientID, StartRange, EndRange.The user needs to add records to a different table - the number being inputted by the user eeds to fall in the range where it is equal to the client he is adding if for. There can be a number of different ranges for a client which where I am falling over, it would be easier if it was just the one range!What is the best way to check this- I was thinking a customer validator method in the code behind?Would I need a Stored Proceedure? or some DataSet Tables and some how parse the ranges?

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Validate A Textbox?

Jan 16, 2009

I need to validate a textbox. the input should have atleast one or more lowercase, one or more uppercase, one or more non-alpha numeric one or more numbers I tried different expressions but in vain. Most of them are requiring me to put in the sequence of how the characters are delacared in the expression. i dont want in a sequence.

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How To Validate For Not Entering Zero In Textbox

Dec 9, 2008

users should not be able to allow zero(0) in textbox.(but can enter 10,100 etc.,)

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Web Forms :: How To Validate A TextBox

Dec 7, 2010

I've 2 textBoxes


if txtQuantity is a positive Number
I must enter something in txtDesc


I can't submit the form without entering txtDesc if txtQuantity is positive/decimal number & No need to enter anything in txtDesc if the txtQuantity is 0/null/empty/space/spaces/blank How?

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MVC Html.textbox - How To Validate Numbers Only

Apr 12, 2010

With the HTML helper, how would you enforce number only without submitting? I know it was done with regular expression if you had a textbox in classic ASP.NET

<%=Html.TextBox("txtYearOfWork",String.Empty, new { maxlength = 4, size="5", autocomplete = "off" }) %>

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How To Use RegularExpressionValidator To Validate My Comments Textbox

May 28, 2009

How do I use RegularExpressionValidator to validate my comments textbox? I do not want user to input any single quotes in the comments.

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Configuration :: Validate A Textbox During Installation

Feb 18, 2011

I am wanting to validate a textbox while creating a setup and deployment project or during installtion(,I used ORCA tool but still not much clear how to use it, with or with out orca.

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Validate A Textbox Value For The Current Date?

Oct 6, 2010

i have a calendar control whose value will be displayed in a textbox, i need to validate the textbox value to the current date... It should not be less than current date.....

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Web Forms :: Validate The Input Textbox

Nov 1, 2010

I have a textbox called "tax rate" which I need to validate the input... The only thing I need to ensure is that the value entered is a number (decimals ok of course). eg. the input might be "8.75" How do I write the validation expression?

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Web Forms :: Use The RegularExpressionValidator To Validate Textbox?

Oct 19, 2010

I have tried everything and can't seem to wrap my head around it...I am trying to use the RegularExpressionValidator to validate that a asp:textbox has an '' in the value that the user types in, and it can't be the first or last character.

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Validate Textbox Base On Drop Down Box?

May 13, 2010

I have a drop down list and a textbox on a form. If a user select employee in the dropdown box, I wish to add employee email addresses in the text box. It should do the same if users select client on the drop down (i. e. Add client addresses in the textbox). I have not been able to do it without having to click on a button.

Here is the code that should be executed:

protected void ddTemplate_SelectedIndexChanged(object sender, EventArgs e)
if (ddTemplate.Text == "Employees")
txtEmailAddress.Text = "";
else if (ddTemplate.Text == "Clients")
txtEmailAddress.Text = "";

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Web Forms :: Validate Textbox After Checkbox Has Been Checked?

Mar 7, 2010

I have the following problem...

I'm developing an an 2 application in c#. This site is being built with accessibility in mind, and as such I need a to build a registration from that validates using server side scripts and
not use client side validation.I need to validate a textbox (whether any text has been entered), if a check box has been checked.

Bear in mind that I can't use any clientside code such as javascript postback that is wired into the <asp:CheckBox /> control.

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Web Forms :: How To Validate The Textbox If The User Entered Only Zero

Dec 23, 2009

Can u give me your answer for the following my question how to validate the textbox if the user is enters only a zero digits using regular expression

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